1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @brief Chain API |
---|
5 | */ |
---|
6 | |
---|
7 | /* |
---|
8 | * Copyright (c) 2010 embedded brains GmbH. |
---|
9 | * |
---|
10 | * COPYRIGHT (c) 1989-2008. |
---|
11 | * On-Line Applications Research Corporation (OAR). |
---|
12 | * |
---|
13 | * The license and distribution terms for this file may be |
---|
14 | * found in the file LICENSE in this distribution or at |
---|
15 | * http://www.rtems.com/license/LICENSE. |
---|
16 | */ |
---|
17 | |
---|
18 | #ifndef _RTEMS_CHAIN_H |
---|
19 | #define _RTEMS_CHAIN_H |
---|
20 | |
---|
21 | #include <rtems/score/chainimpl.h> |
---|
22 | #include <rtems/rtems/event.h> |
---|
23 | |
---|
24 | #ifdef __cplusplus |
---|
25 | extern "C" { |
---|
26 | #endif |
---|
27 | |
---|
28 | /** |
---|
29 | * @defgroup ClassicChains Chains |
---|
30 | * |
---|
31 | * @ingroup ClassicRTEMS |
---|
32 | * |
---|
33 | * @brief Chain API |
---|
34 | */ |
---|
35 | /**@{**/ |
---|
36 | |
---|
37 | typedef Chain_Node rtems_chain_node; |
---|
38 | |
---|
39 | typedef Chain_Control rtems_chain_control; |
---|
40 | |
---|
41 | /** |
---|
42 | * @brief Chain initializer for an empty chain with designator @a name. |
---|
43 | */ |
---|
44 | #define RTEMS_CHAIN_INITIALIZER_EMPTY(name) \ |
---|
45 | CHAIN_INITIALIZER_EMPTY(name) |
---|
46 | |
---|
47 | /** |
---|
48 | * @brief Chain initializer for a chain with one @a node. |
---|
49 | * |
---|
50 | * @see RTEMS_CHAIN_NODE_INITIALIZER_ONE_NODE_CHAIN(). |
---|
51 | */ |
---|
52 | #define RTEMS_CHAIN_INITIALIZER_ONE_NODE( node ) \ |
---|
53 | CHAIN_INITIALIZER_ONE_NODE( node ) |
---|
54 | |
---|
55 | /** |
---|
56 | * @brief Chain node initializer for a @a chain containing exactly this node. |
---|
57 | * |
---|
58 | * @see RTEMS_CHAIN_INITIALIZER_ONE_NODE(). |
---|
59 | */ |
---|
60 | #define RTEMS_CHAIN_NODE_INITIALIZER_ONE_NODE_CHAIN( chain ) \ |
---|
61 | CHAIN_NODE_INITIALIZER_ONE_NODE_CHAIN( chain ) |
---|
62 | |
---|
63 | /** |
---|
64 | * @brief Chain definition for an empty chain with designator @a name. |
---|
65 | */ |
---|
66 | #define RTEMS_CHAIN_DEFINE_EMPTY(name) \ |
---|
67 | CHAIN_DEFINE_EMPTY(name) |
---|
68 | |
---|
69 | /** |
---|
70 | * @brief Appends the @a node to the @a chain and sends the @a events to the |
---|
71 | * @a task if the @a chain was empty before the append. |
---|
72 | * |
---|
73 | * @see rtems_chain_append_with_empty_check() and rtems_event_send(). |
---|
74 | * |
---|
75 | * @retval RTEMS_SUCCESSFUL Successful operation. |
---|
76 | * @retval RTEMS_INVALID_ID No such task. |
---|
77 | */ |
---|
78 | rtems_status_code rtems_chain_append_with_notification( |
---|
79 | rtems_chain_control *chain, |
---|
80 | rtems_chain_node *node, |
---|
81 | rtems_id task, |
---|
82 | rtems_event_set events |
---|
83 | ); |
---|
84 | |
---|
85 | /** |
---|
86 | * @brief Prepends the @a node to the @a chain and sends the @a events to the |
---|
87 | * @a task if the @a chain was empty before the prepend. |
---|
88 | * |
---|
89 | * @see rtems_chain_prepend_with_empty_check() and rtems_event_send(). |
---|
90 | * |
---|
91 | * @retval RTEMS_SUCCESSFUL Successful operation. |
---|
92 | * @retval RTEMS_INVALID_ID No such task. |
---|
93 | */ |
---|
94 | rtems_status_code rtems_chain_prepend_with_notification( |
---|
95 | rtems_chain_control *chain, |
---|
96 | rtems_chain_node *node, |
---|
97 | rtems_id task, |
---|
98 | rtems_event_set events |
---|
99 | ); |
---|
100 | |
---|
101 | /** |
---|
102 | * @brief Gets the first @a node of the @a chain and sends the @a events to the |
---|
103 | * @a task if the @a chain is empty after the get. |
---|
104 | * |
---|
105 | * @see rtems_chain_get_with_empty_check() and rtems_event_send(). |
---|
106 | * |
---|
107 | * @retval RTEMS_SUCCESSFUL Successful operation. |
---|
108 | * @retval RTEMS_INVALID_ID No such task. |
---|
109 | */ |
---|
110 | rtems_status_code rtems_chain_get_with_notification( |
---|
111 | rtems_chain_control *chain, |
---|
112 | rtems_id task, |
---|
113 | rtems_event_set events, |
---|
114 | rtems_chain_node **node |
---|
115 | ); |
---|
116 | |
---|
117 | /** |
---|
118 | * @brief Gets the first @a node of the @a chain and sends the @a events to the |
---|
119 | * @a task if the @a chain is empty afterwards. |
---|
120 | * |
---|
121 | * @see rtems_chain_get() and rtems_event_receive(). |
---|
122 | * |
---|
123 | * @retval RTEMS_SUCCESSFUL Successful operation. |
---|
124 | * @retval RTEMS_TIMEOUT Timeout. |
---|
125 | */ |
---|
126 | rtems_status_code rtems_chain_get_with_wait( |
---|
127 | rtems_chain_control *chain, |
---|
128 | rtems_event_set events, |
---|
129 | rtems_interval timeout, |
---|
130 | rtems_chain_node **node |
---|
131 | ); |
---|
132 | |
---|
133 | /** |
---|
134 | * @brief Initialize a chain Header. |
---|
135 | * |
---|
136 | * This routine initializes @a the_chain structure to manage the |
---|
137 | * contiguous array of @a number_nodes nodes which starts at |
---|
138 | * @a starting_address. Each node is of @a node_size bytes. |
---|
139 | * |
---|
140 | * @param[in] the_chain specifies the chain to initialize |
---|
141 | * @param[in] starting_address is the starting address of the array |
---|
142 | * of elements |
---|
143 | * @param[in] number_nodes is the number of nodes that will be in the chain |
---|
144 | * @param[in] node_size is the size of each node |
---|
145 | */ |
---|
146 | RTEMS_INLINE_ROUTINE void rtems_chain_initialize( |
---|
147 | rtems_chain_control *the_chain, |
---|
148 | void *starting_address, |
---|
149 | size_t number_nodes, |
---|
150 | size_t node_size |
---|
151 | ) |
---|
152 | { |
---|
153 | _Chain_Initialize( the_chain, starting_address, number_nodes, node_size ); |
---|
154 | } |
---|
155 | |
---|
156 | /** |
---|
157 | * @brief Initialize this chain as empty. |
---|
158 | * |
---|
159 | * This routine initializes the specified chain to contain zero nodes. |
---|
160 | * |
---|
161 | * @param[in] the_chain is the chain to be initialized. |
---|
162 | */ |
---|
163 | RTEMS_INLINE_ROUTINE void rtems_chain_initialize_empty( |
---|
164 | rtems_chain_control *the_chain |
---|
165 | ) |
---|
166 | { |
---|
167 | _Chain_Initialize_empty( the_chain ); |
---|
168 | } |
---|
169 | |
---|
170 | /** |
---|
171 | * @brief Set off chain. |
---|
172 | * |
---|
173 | * This function sets the next and previous fields of the @a node to NULL |
---|
174 | * indicating the @a node is not part of a chain. |
---|
175 | * |
---|
176 | * @param[in] node the node set to off chain. |
---|
177 | */ |
---|
178 | RTEMS_INLINE_ROUTINE void rtems_chain_set_off_chain( |
---|
179 | rtems_chain_node *node |
---|
180 | ) |
---|
181 | { |
---|
182 | _Chain_Set_off_chain( node ); |
---|
183 | } |
---|
184 | |
---|
185 | /** |
---|
186 | * @brief Is the node off chain. |
---|
187 | * |
---|
188 | * This function returns true if the @a node is not on a chain. A @a node is |
---|
189 | * off chain if the next and previous fields are set to NULL. |
---|
190 | * |
---|
191 | * @param[in] node is the node off chain. |
---|
192 | * |
---|
193 | * @retval true The node is off chain. |
---|
194 | * @retval false The node is not off chain. |
---|
195 | */ |
---|
196 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_node_off_chain( |
---|
197 | const rtems_chain_node *node |
---|
198 | ) |
---|
199 | { |
---|
200 | return _Chain_Is_node_off_chain( node ); |
---|
201 | } |
---|
202 | |
---|
203 | /** |
---|
204 | * @brief Is the chain node pointer NULL. |
---|
205 | * |
---|
206 | * This function returns true if the_node is NULL and false otherwise. |
---|
207 | * |
---|
208 | * @param[in] the_node is the node pointer to check. |
---|
209 | * |
---|
210 | * @retval true The chain node pointer is NULL. |
---|
211 | * @retval false The chain node pointer is not NULL. |
---|
212 | */ |
---|
213 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_null_node( |
---|
214 | const rtems_chain_node *the_node |
---|
215 | ) |
---|
216 | { |
---|
217 | return _Chain_Is_null_node( the_node ); |
---|
218 | } |
---|
219 | |
---|
220 | /** |
---|
221 | * @brief Return pointer to Chain Head |
---|
222 | * |
---|
223 | * This function returns a pointer to the first node on the chain. |
---|
224 | * |
---|
225 | * @param[in] the_chain is the chain to be operated upon. |
---|
226 | * |
---|
227 | * @return This method returns the permanent node of the chain. |
---|
228 | */ |
---|
229 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_head( |
---|
230 | rtems_chain_control *the_chain |
---|
231 | ) |
---|
232 | { |
---|
233 | return _Chain_Head( the_chain ); |
---|
234 | } |
---|
235 | |
---|
236 | /** |
---|
237 | * @brief Return pointer to immutable Chain Head |
---|
238 | * |
---|
239 | * This function returns a pointer to the head node on the chain. |
---|
240 | * |
---|
241 | * @param[in] the_chain is the chain to be operated upon. |
---|
242 | * |
---|
243 | * @return This method returns the permanent head node of the chain. |
---|
244 | */ |
---|
245 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_head( |
---|
246 | const rtems_chain_control *the_chain |
---|
247 | ) |
---|
248 | { |
---|
249 | return _Chain_Immutable_head( the_chain ); |
---|
250 | } |
---|
251 | |
---|
252 | /** |
---|
253 | * @brief Return pointer to Chain Tail |
---|
254 | * |
---|
255 | * This function returns a pointer to the tail node on the chain. |
---|
256 | * |
---|
257 | * @param[in] the_chain is the chain to be operated upon. |
---|
258 | * |
---|
259 | * @return This method returns the permanent tail node of the chain. |
---|
260 | */ |
---|
261 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_tail( |
---|
262 | rtems_chain_control *the_chain |
---|
263 | ) |
---|
264 | { |
---|
265 | return _Chain_Tail( the_chain ); |
---|
266 | } |
---|
267 | |
---|
268 | /** |
---|
269 | * @brief Return pointer to immutable Chain Tail |
---|
270 | * |
---|
271 | * This function returns a pointer to the tail node on the chain. |
---|
272 | * |
---|
273 | * @param[in] the_chain is the chain to be operated upon. |
---|
274 | * |
---|
275 | * @return This method returns the permanent tail node of the chain. |
---|
276 | */ |
---|
277 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_tail( |
---|
278 | const rtems_chain_control *the_chain |
---|
279 | ) |
---|
280 | { |
---|
281 | return _Chain_Immutable_tail( the_chain ); |
---|
282 | } |
---|
283 | |
---|
284 | /** |
---|
285 | * @brief Return pointer to Chain's First node after the permanent head. |
---|
286 | * |
---|
287 | * This function returns a pointer to the first node on the chain after the |
---|
288 | * head. |
---|
289 | * |
---|
290 | * @param[in] the_chain is the chain to be operated upon. |
---|
291 | * |
---|
292 | * @return This method returns the first node of the chain. |
---|
293 | */ |
---|
294 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_first( |
---|
295 | rtems_chain_control *the_chain |
---|
296 | ) |
---|
297 | { |
---|
298 | return _Chain_First( the_chain ); |
---|
299 | } |
---|
300 | |
---|
301 | /** |
---|
302 | * @brief Return pointer to immutable Chain's First node |
---|
303 | * |
---|
304 | * This function returns a pointer to the first node on the chain after the |
---|
305 | * head. |
---|
306 | * |
---|
307 | * @param[in] the_chain is the chain to be operated upon. |
---|
308 | * |
---|
309 | * @return This method returns the first node of the chain. |
---|
310 | */ |
---|
311 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_first( |
---|
312 | const rtems_chain_control *the_chain |
---|
313 | ) |
---|
314 | { |
---|
315 | return _Chain_Immutable_first( the_chain ); |
---|
316 | } |
---|
317 | |
---|
318 | /** |
---|
319 | * @brief Return pointer to Chain's Last node before the permanent tail. |
---|
320 | * |
---|
321 | * This function returns a pointer to the last node on the chain just before |
---|
322 | * the tail. |
---|
323 | * |
---|
324 | * @param[in] the_chain is the chain to be operated upon. |
---|
325 | * |
---|
326 | * @return This method returns the last node of the chain. |
---|
327 | */ |
---|
328 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_last( |
---|
329 | rtems_chain_control *the_chain |
---|
330 | ) |
---|
331 | { |
---|
332 | return _Chain_Last( the_chain ); |
---|
333 | } |
---|
334 | |
---|
335 | /** |
---|
336 | * @brief Return pointer to immutable Chain's Last node |
---|
337 | * |
---|
338 | * This function returns a pointer to the last node on the chain just before |
---|
339 | * the tail. |
---|
340 | * |
---|
341 | * @param[in] the_chain is the chain to be operated upon. |
---|
342 | * |
---|
343 | * @return This method returns the last node of the chain. |
---|
344 | */ |
---|
345 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_last( |
---|
346 | const rtems_chain_control *the_chain |
---|
347 | ) |
---|
348 | { |
---|
349 | return _Chain_Immutable_last( the_chain ); |
---|
350 | } |
---|
351 | |
---|
352 | /** |
---|
353 | * @brief Return pointer the next node from this node |
---|
354 | * |
---|
355 | * This function returns a pointer to the next node after this node. |
---|
356 | * |
---|
357 | * @param[in] the_node is the node to be operated upon. |
---|
358 | * |
---|
359 | * @return This method returns the next node on the chain. |
---|
360 | */ |
---|
361 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_next( |
---|
362 | rtems_chain_node *the_node |
---|
363 | ) |
---|
364 | { |
---|
365 | return _Chain_Next( the_node ); |
---|
366 | } |
---|
367 | |
---|
368 | /** |
---|
369 | * @brief Return pointer the immutable next node from this node |
---|
370 | * |
---|
371 | * This function returns a pointer to the next node after this node. |
---|
372 | * |
---|
373 | * @param[in] the_node is the node to be operated upon. |
---|
374 | * |
---|
375 | * @return This method returns the next node on the chain. |
---|
376 | */ |
---|
377 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_next( |
---|
378 | const rtems_chain_node *the_node |
---|
379 | ) |
---|
380 | { |
---|
381 | return _Chain_Immutable_next( the_node ); |
---|
382 | } |
---|
383 | |
---|
384 | /** |
---|
385 | * @brief Return pointer the previous node from this node |
---|
386 | * |
---|
387 | * This function returns a pointer to the previous node on this chain. |
---|
388 | * |
---|
389 | * @param[in] the_node is the node to be operated upon. |
---|
390 | * |
---|
391 | * @return This method returns the previous node on the chain. |
---|
392 | */ |
---|
393 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_previous( |
---|
394 | rtems_chain_node *the_node |
---|
395 | ) |
---|
396 | { |
---|
397 | return _Chain_Previous( the_node ); |
---|
398 | } |
---|
399 | |
---|
400 | /** |
---|
401 | * @brief Return pointer the immutable previous node from this node. |
---|
402 | * |
---|
403 | * This function returns a pointer to the previous node on this chain. |
---|
404 | * |
---|
405 | * @param[in] the_node is the node to be operated upon. |
---|
406 | * |
---|
407 | * @return This method returns the previous node on the chain. |
---|
408 | */ |
---|
409 | RTEMS_INLINE_ROUTINE const rtems_chain_node *rtems_chain_immutable_previous( |
---|
410 | const rtems_chain_node *the_node |
---|
411 | ) |
---|
412 | { |
---|
413 | return _Chain_Immutable_previous( the_node ); |
---|
414 | } |
---|
415 | |
---|
416 | /** |
---|
417 | * @brief Are Two nodes equal. |
---|
418 | * |
---|
419 | * This function returns true if @a left and @a right are equal, |
---|
420 | * and false otherwise. |
---|
421 | * |
---|
422 | * @param[in] left is the node on the left hand side of the comparison. |
---|
423 | * @param[in] right is the node on the left hand side of the comparison. |
---|
424 | * |
---|
425 | * @retval true @a left is equal to @a right. |
---|
426 | * @retval false @a left is not equal to @a right |
---|
427 | */ |
---|
428 | RTEMS_INLINE_ROUTINE bool rtems_chain_are_nodes_equal( |
---|
429 | const rtems_chain_node *left, |
---|
430 | const rtems_chain_node *right |
---|
431 | ) |
---|
432 | { |
---|
433 | return _Chain_Are_nodes_equal( left, right ); |
---|
434 | } |
---|
435 | |
---|
436 | /** |
---|
437 | * @brief Is the chain empty |
---|
438 | * |
---|
439 | * This function returns true if there a no nodes on @a the_chain and |
---|
440 | * false otherwise. |
---|
441 | * |
---|
442 | * @param[in] the_chain is the chain to be operated upon. |
---|
443 | * |
---|
444 | * @retval true The chain is empty. |
---|
445 | * @retval false The chain is not empty. |
---|
446 | */ |
---|
447 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_empty( |
---|
448 | const rtems_chain_control *the_chain |
---|
449 | ) |
---|
450 | { |
---|
451 | return _Chain_Is_empty( the_chain ); |
---|
452 | } |
---|
453 | |
---|
454 | /** |
---|
455 | * @brief Is this the first node on the chain. |
---|
456 | * |
---|
457 | * This function returns true if the_node is the first node on a chain and |
---|
458 | * false otherwise. |
---|
459 | * |
---|
460 | * @param[in] the_node is the node the caller wants to know if it is |
---|
461 | * the first node on a chain. |
---|
462 | * |
---|
463 | * @retval true @a the_node is the first node on a chain. |
---|
464 | * @retval false @a the_node is not the first node on a chain. |
---|
465 | */ |
---|
466 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_first( |
---|
467 | const rtems_chain_node *the_node |
---|
468 | ) |
---|
469 | { |
---|
470 | return _Chain_Is_first( the_node ); |
---|
471 | } |
---|
472 | |
---|
473 | /** |
---|
474 | * @brief Is this the last node on the chain. |
---|
475 | * |
---|
476 | * This function returns true if @a the_node is the last node on a chain and |
---|
477 | * false otherwise. |
---|
478 | * |
---|
479 | * @param[in] the_node is the node to check as the last node. |
---|
480 | * |
---|
481 | * @retval true @a the_node is the last node on a chain. |
---|
482 | * @retval false @a the_node is not the last node on a chain |
---|
483 | */ |
---|
484 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_last( |
---|
485 | const rtems_chain_node *the_node |
---|
486 | ) |
---|
487 | { |
---|
488 | return _Chain_Is_last( the_node ); |
---|
489 | } |
---|
490 | |
---|
491 | /** |
---|
492 | * @brief Does this chain have only one node. |
---|
493 | * |
---|
494 | * This function returns true if there is only one node on @a the_chain and |
---|
495 | * false otherwise. |
---|
496 | * |
---|
497 | * @param[in] the_chain is the chain to be operated upon. |
---|
498 | * |
---|
499 | * @retval true The chain has only one node. |
---|
500 | * @retval false The chain has more than one nodes. |
---|
501 | */ |
---|
502 | RTEMS_INLINE_ROUTINE bool rtems_chain_has_only_one_node( |
---|
503 | const rtems_chain_control *the_chain |
---|
504 | ) |
---|
505 | { |
---|
506 | return _Chain_Has_only_one_node( the_chain ); |
---|
507 | } |
---|
508 | |
---|
509 | /** |
---|
510 | * @brief Is this node the chain head. |
---|
511 | * |
---|
512 | * This function returns true if @a the_node is the head of the_chain and |
---|
513 | * false otherwise. |
---|
514 | * |
---|
515 | * @param[in] the_chain is the chain to be operated upon. |
---|
516 | * @param[in] the_node is the node to check for being the Chain Head. |
---|
517 | * |
---|
518 | * @retval true @a the_node is the head of @a the_chain. |
---|
519 | * @retval false @a the_node is not the head of @a the_chain. |
---|
520 | */ |
---|
521 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_head( |
---|
522 | const rtems_chain_control *the_chain, |
---|
523 | const rtems_chain_node *the_node |
---|
524 | ) |
---|
525 | { |
---|
526 | return _Chain_Is_head( the_chain, the_node ); |
---|
527 | } |
---|
528 | |
---|
529 | /** |
---|
530 | * @brief Is this node the chain tail. |
---|
531 | * |
---|
532 | * This function returns true if the_node is the tail of the_chain and |
---|
533 | * false otherwise. |
---|
534 | * |
---|
535 | * @param[in] the_chain is the chain to be operated upon. |
---|
536 | * @param[in] the_node is the node to check for being the Chain Tail. |
---|
537 | * |
---|
538 | * @retval true @a the_node is the tail of @a the_chain. |
---|
539 | * @retval false @a the_node is not the tail of @a the_chain. |
---|
540 | */ |
---|
541 | RTEMS_INLINE_ROUTINE bool rtems_chain_is_tail( |
---|
542 | const rtems_chain_control *the_chain, |
---|
543 | const rtems_chain_node *the_node |
---|
544 | ) |
---|
545 | { |
---|
546 | return _Chain_Is_tail( the_chain, the_node ); |
---|
547 | } |
---|
548 | |
---|
549 | /** |
---|
550 | * @brief Extract the specified node from a chain. |
---|
551 | * |
---|
552 | * This routine extracts @a the_node from the chain on which it resides. |
---|
553 | * It disables interrupts to ensure the atomicity of the |
---|
554 | * extract operation. |
---|
555 | * |
---|
556 | * @arg the_node specifies the node to extract |
---|
557 | */ |
---|
558 | RTEMS_INLINE_ROUTINE void rtems_chain_extract( |
---|
559 | rtems_chain_node *the_node |
---|
560 | ) |
---|
561 | { |
---|
562 | _Chain_Extract( the_node ); |
---|
563 | } |
---|
564 | |
---|
565 | /** |
---|
566 | * @brief Extract the specified node from a chain (unprotected). |
---|
567 | * |
---|
568 | * This routine extracts @a the_node from the chain on which it resides. |
---|
569 | * |
---|
570 | * NOTE: It does NOT disable interrupts to ensure the atomicity of the |
---|
571 | * append operation. |
---|
572 | */ |
---|
573 | RTEMS_INLINE_ROUTINE void rtems_chain_extract_unprotected( |
---|
574 | rtems_chain_node *the_node |
---|
575 | ) |
---|
576 | { |
---|
577 | _Chain_Extract_unprotected( the_node ); |
---|
578 | } |
---|
579 | |
---|
580 | /** |
---|
581 | * @brief Obtain the first node on a chain. |
---|
582 | * |
---|
583 | * This function removes the first node from @a the_chain and returns |
---|
584 | * a pointer to that node. If @a the_chain is empty, then NULL is returned. |
---|
585 | * |
---|
586 | * @return This method returns a pointer a node. If a node was removed, |
---|
587 | * then a pointer to that node is returned. If @a the_chain was |
---|
588 | * empty, then NULL is returned. |
---|
589 | * |
---|
590 | * NOTE: It disables interrupts to ensure the atomicity of the get operation. |
---|
591 | */ |
---|
592 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_get( |
---|
593 | rtems_chain_control *the_chain |
---|
594 | ) |
---|
595 | { |
---|
596 | return _Chain_Get( the_chain ); |
---|
597 | } |
---|
598 | |
---|
599 | /** |
---|
600 | * @brief See _Chain_Get_unprotected(). |
---|
601 | */ |
---|
602 | RTEMS_INLINE_ROUTINE rtems_chain_node *rtems_chain_get_unprotected( |
---|
603 | rtems_chain_control *the_chain |
---|
604 | ) |
---|
605 | { |
---|
606 | return _Chain_Get_unprotected( the_chain ); |
---|
607 | } |
---|
608 | |
---|
609 | /** |
---|
610 | * @brief Insert a node on a chain |
---|
611 | * |
---|
612 | * This routine inserts @a the_node on a chain immediately following |
---|
613 | * @a after_node. |
---|
614 | * |
---|
615 | * NOTE: It disables interrupts to ensure the atomicity |
---|
616 | * of the extract operation. |
---|
617 | */ |
---|
618 | RTEMS_INLINE_ROUTINE void rtems_chain_insert( |
---|
619 | rtems_chain_node *after_node, |
---|
620 | rtems_chain_node *the_node |
---|
621 | ) |
---|
622 | { |
---|
623 | _Chain_Insert( after_node, the_node ); |
---|
624 | } |
---|
625 | |
---|
626 | /** |
---|
627 | * @brief See _Chain_Insert_unprotected(). |
---|
628 | */ |
---|
629 | RTEMS_INLINE_ROUTINE void rtems_chain_insert_unprotected( |
---|
630 | rtems_chain_node *after_node, |
---|
631 | rtems_chain_node *the_node |
---|
632 | ) |
---|
633 | { |
---|
634 | _Chain_Insert_unprotected( after_node, the_node ); |
---|
635 | } |
---|
636 | |
---|
637 | /** |
---|
638 | * @brief Append a node on the end of a chain. |
---|
639 | * |
---|
640 | * This routine appends @a the_node onto the end of @a the_chain. |
---|
641 | * |
---|
642 | * NOTE: It disables interrupts to ensure the atomicity of the |
---|
643 | * append operation. |
---|
644 | */ |
---|
645 | RTEMS_INLINE_ROUTINE void rtems_chain_append( |
---|
646 | rtems_chain_control *the_chain, |
---|
647 | rtems_chain_node *the_node |
---|
648 | ) |
---|
649 | { |
---|
650 | _Chain_Append( the_chain, the_node ); |
---|
651 | } |
---|
652 | |
---|
653 | /** |
---|
654 | * @brief Append a node on the end of a chain (unprotected). |
---|
655 | * |
---|
656 | * This routine appends @a the_node onto the end of @a the_chain. |
---|
657 | * |
---|
658 | * NOTE: It does NOT disable interrupts to ensure the atomicity of the |
---|
659 | * append operation. |
---|
660 | */ |
---|
661 | RTEMS_INLINE_ROUTINE void rtems_chain_append_unprotected( |
---|
662 | rtems_chain_control *the_chain, |
---|
663 | rtems_chain_node *the_node |
---|
664 | ) |
---|
665 | { |
---|
666 | _Chain_Append_unprotected( the_chain, the_node ); |
---|
667 | } |
---|
668 | |
---|
669 | /** |
---|
670 | * @brief Prepend a node. |
---|
671 | * |
---|
672 | * This routine prepends the_node onto the front of the_chain. |
---|
673 | * |
---|
674 | * @param[in] the_chain is the chain to be operated upon. |
---|
675 | * @param[in] the_node is the node to be prepended. |
---|
676 | * |
---|
677 | * NOTE: It disables interrupts to ensure the atomicity of the |
---|
678 | * prepend operation. |
---|
679 | */ |
---|
680 | RTEMS_INLINE_ROUTINE void rtems_chain_prepend( |
---|
681 | rtems_chain_control *the_chain, |
---|
682 | rtems_chain_node *the_node |
---|
683 | ) |
---|
684 | { |
---|
685 | _Chain_Prepend( the_chain, the_node ); |
---|
686 | } |
---|
687 | |
---|
688 | /** |
---|
689 | * @brief Prepend a node (unprotected). |
---|
690 | * |
---|
691 | * This routine prepends the_node onto the front of the_chain. |
---|
692 | * |
---|
693 | * @param[in] the_chain is the chain to be operated upon. |
---|
694 | * @param[in] the_node is the node to be prepended. |
---|
695 | * |
---|
696 | * NOTE: It does NOT disable interrupts to ensure the atomicity of the |
---|
697 | * prepend operation. |
---|
698 | */ |
---|
699 | RTEMS_INLINE_ROUTINE void rtems_chain_prepend_unprotected( |
---|
700 | rtems_chain_control *the_chain, |
---|
701 | rtems_chain_node *the_node |
---|
702 | ) |
---|
703 | { |
---|
704 | _Chain_Prepend_unprotected( the_chain, the_node ); |
---|
705 | } |
---|
706 | |
---|
707 | /** |
---|
708 | * @brief Checks if the @a chain is empty and appends the @a node. |
---|
709 | * |
---|
710 | * Interrupts are disabled to ensure the atomicity of the operation. |
---|
711 | * |
---|
712 | * @retval true The chain was empty before the append. |
---|
713 | * @retval false The chain contained at least one node before the append. |
---|
714 | */ |
---|
715 | RTEMS_INLINE_ROUTINE bool rtems_chain_append_with_empty_check( |
---|
716 | rtems_chain_control *chain, |
---|
717 | rtems_chain_node *node |
---|
718 | ) |
---|
719 | { |
---|
720 | return _Chain_Append_with_empty_check( chain, node ); |
---|
721 | } |
---|
722 | |
---|
723 | /** |
---|
724 | * @brief Checks if the @a chain is empty and prepends the @a node. |
---|
725 | * |
---|
726 | * Interrupts are disabled to ensure the atomicity of the operation. |
---|
727 | * |
---|
728 | * @retval true The chain was empty before the prepend. |
---|
729 | * @retval false The chain contained at least one node before the prepend. |
---|
730 | */ |
---|
731 | RTEMS_INLINE_ROUTINE bool rtems_chain_prepend_with_empty_check( |
---|
732 | rtems_chain_control *chain, |
---|
733 | rtems_chain_node *node |
---|
734 | ) |
---|
735 | { |
---|
736 | return _Chain_Prepend_with_empty_check( chain, node ); |
---|
737 | } |
---|
738 | |
---|
739 | /** |
---|
740 | * @brief Tries to get the first @a node and check if the @a chain is empty |
---|
741 | * afterwards. |
---|
742 | * |
---|
743 | * This function removes the first node from the @a chain and returns a pointer |
---|
744 | * to that node in @a node. If the @a chain is empty, then @c NULL is returned. |
---|
745 | * |
---|
746 | * Interrupts are disabled to ensure the atomicity of the operation. |
---|
747 | * |
---|
748 | * @retval true The chain is empty after the node removal. |
---|
749 | * @retval false The chain contained at least one node after the node removal. |
---|
750 | */ |
---|
751 | RTEMS_INLINE_ROUTINE bool rtems_chain_get_with_empty_check( |
---|
752 | rtems_chain_control *chain, |
---|
753 | rtems_chain_node **node |
---|
754 | ) |
---|
755 | { |
---|
756 | return _Chain_Get_with_empty_check( chain, node ); |
---|
757 | } |
---|
758 | |
---|
759 | /** |
---|
760 | * @brief Returns the node count of the chain. |
---|
761 | * |
---|
762 | * @param[in] chain The chain. |
---|
763 | * |
---|
764 | * @note It does NOT disable interrupts to ensure the atomicity of the |
---|
765 | * operation. |
---|
766 | * |
---|
767 | * @return The node count of the chain. |
---|
768 | */ |
---|
769 | RTEMS_INLINE_ROUTINE size_t rtems_chain_node_count_unprotected( |
---|
770 | const rtems_chain_control *chain |
---|
771 | ) |
---|
772 | { |
---|
773 | return _Chain_Node_count_unprotected( chain ); |
---|
774 | } |
---|
775 | |
---|
776 | /** @} */ |
---|
777 | |
---|
778 | #ifdef __cplusplus |
---|
779 | } |
---|
780 | #endif |
---|
781 | |
---|
782 | #endif |
---|
783 | /* end of include file */ |
---|